There are several reports of problems just in this forum. I'll keep googling to see if this OS is stable.
I'm stating the obvious, but this update could fix a lot of problems or cause new ones. I've previously had problems with the power saving feature that would cause trouble with networked apps. And I have Pandora which I use a lot which shouldn't be affected by an OS upgrade but who knows.
Maybe it will fix the power problem, maybe not. If there is no way to back out, it could be pretty painful.